1317305321 has 8 divisors (see below), whose sum is σ = 1390209600. Its totient is φ = 1244758320.

The previous prime is 1317305317. The next prime is 1317305323. The reversal of 1317305321 is 1235037131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1317305321 - 2² = 1317305317 is a prime.

It is a super-3 number, since 3×1317305321³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1317305323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81725 + ... + 96506.

It is an arithmetic number, because the mean of its divisors is an integer number (173776200).

Almost surely, 2^1317305321 is an apocalyptic number.

It is an amenable number.

1317305321 is a deficient number, since it is larger than the sum of its proper divisors (72904279).

1317305321 is a wasteful number, since it uses less digits than its factorization.

1317305321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178639.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 1317305321 is about 36294.7010044166. The cubic root of 1317305321 is about 1096.2143477729.

The spelling of 1317305321 in words is "one billion, three hundred seventeen million, three hundred five thousand, three hundred twenty-one".